The -- in -- showed up with 233 round magazines one which was in his nine millimeter. He unloaded the contents of that magazine in fifteen seconds very quickly that all happened very very best the 41 bullet went into -- -- Bullet number thirteen. -- -- -- -- -- a nine year old girl named Christina Taylor Green. Who was very interested in democracy. And our government. And really deserved. A full life admitted to advancing those ideas. If he had a ten round magazine. Only backed up. When he tried to -- -- 133 round magazine with another 33 -- magazine he dropped -- And a woman named Patricia mace grabbed it and it gave bystanders. But declined to tackled him. I contend. If that same thing happened when he was -- and re load 110 round magazine with another ten round magazine meaning he did not have access to a high capacity magazine. And the same thing happened. Christina Taylor Green would be alive today. I certainly am willing to give up. My right to own a high capacity magazine. The brain that young woman back that young girl. -- let me let me let me continue with what happened that day. In that fifteen seconds -- -- with the first shot a man ran at a Walgreens. A good guy with a gun. With the intent to do the right thing. And -- citizen. He came with -- He admits that he came within about a half a second of shooting the man who -- Jared -- And nearly killing him. I mean we almost had this horrific mass murder followed up with a horrific accident. The horrific mass murder because of the high capacity magazine. And the horrific accident. Because of the beat the armed person there who with good intentions. Wanted to and something that was. That was going really bad.

This transcript has been automatically generated and may not be 100% accurate.

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